The text says that sound travels through air. What is the speed of sound in air? A. 340 meters per second. B. 300,000 kilometers per second. C. 100 meters per hour. D. 1000 kilometers per hour. 相关知识点: 试题来源: 解析 A。声音在空气中的传播速度是 340 米每秒。选项 B 是光...
Sound is produced by vibrations. What is the speed of sound in air? A. 340 meters per second. B. 340 kilometers per hour. C. 3400 meters per second. D. 3400 kilometers per hour. 相关知识点: 试题来源: 解析 A。解析:声音在空气中的传播速度是 340 米每秒。选项 B、C、D 速度错误。
1. What's the speed of sound at 2500 meters above sea level?相关知识点: 试题来源: 解析 285.3米/秒 声音速度受温度和气压影响。在2500米海拔,气压约为海平面的0.75倍,温度约为-2摄氏度。根据公式c = 331.5 0.6T,在-2摄氏度时,声音速度约为330.3米/秒。由于声音速度与气压平方根成正比,因此在2500米...
求翻译:what is the speed of sound?是什么意思?待解决 悬赏分:1 - 离问题结束还有 what is the speed of sound?问题补充:匿名 2013-05-23 12:26:38 什么是 sound? 的速度热门同步练习册答案初中同步测控优化设计答案 长江作业本同步练习册答案 名校课堂助教型教辅答案 U计划学期系统复习答案 同步练习册...
结果1 题目 25 What does the speed of sound in air depend on? A temperature of the air B pitch of the sound C loudness of the sound D distance between the source and receiver of the sound 相关知识点: 试题来源: 解析 A 反馈 收藏 ...
By analyzing the speed of sound through the ocean over time ,the scientists will be able to determine if our planet is warming up. The experiment was nearly cancelled more than a year ago because environmental groups fear that the sound will confuse or harm sea animals. So scientists are ...
How fast is the sound wave in air? Although 340 m/s (760 mph) is a good first answer, it isn't always true. Let's look back a the wave of people in a football stadium. What would make this speed change? Two things could clearly make a difference. Suppose the stadium wasn't ...
Write down the three groups of words and phrases that are used in the video to describe processes. (写出视频中用到的四组用来描述过程的词和词组。) 请按照视频中出现的顺序填写。Group 1: ___, ___, ___, ___, ___.Group 2: ___...
a The speed of sound in water is roughly one mile a second—slower than through land but faster than through air. What is most important, different layers of ocean water can act as channels for sounds, focusing them in the same way a stethoscope (听诊器) does when it carries faint ...
3. Elasticity of the Medium: - The speed of sound is directly proportional to the square root of the elasticity of the medium. - Different states of matter (solid, liquid, gas) have different measures of elasticity: - In solids, it is related to Young's modulus. - In liquids, it is...